With Plural Resonant Circuits Patents (Class 455/193.2)
  • Patent number: 9964970
    Abstract: Disclosed herein is an apparatus and a method for controlling heat according to a use environment of a wireless communication terminal in the wireless communication terminal. The method includes measuring an internal temperature of the wireless communication terminal when the wireless communication terminal performs communication by using a predetermined channel or band. The method includes acquiring a heat control method matched to a currently-measured internal temperature from a heat control table having temperature ranges of heat generated within the wireless communication terminal, after the wireless communication terminal selects at least one of bands or channels and performs communication by using the selected at least one band or channel, and storing a heat control method in each temperature range. The method includes controlling the heat generated within the wireless communication terminal according to the acquired heat control method.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: May 8, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Seunghui Sunwoo
  • Patent number: 9590679
    Abstract: A mobile communication device includes an antenna element, a low-frequency blocking element, an isolation circuit, a first high-frequency blocking element and a second high-frequency blocking element. The antenna element converts a radio-frequency signal into an electromagnetic wave and includes a radiation portion and a parasitic portion. The parasitic portion and the radiation portion generate a first sensing signal and a second sensing signal in response to a proximity of an object. The low-frequency blocking element transmits the radio-frequency signal to the radiation portion. The isolation circuit is connected between the parasitic portion and a ground plane, and the isolation circuit blocks the first sensing signal and transmits the radio-frequency signal. The first high-frequency blocking element transmits the first sensing signal to a first sensing controller through a first metal line.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: March 7, 2017
    Assignee: Acer Incorporated
    Inventor: Chung-Wen Yang
  • Patent number: 9153865
    Abstract: A multiband-capable antenna device includes a loop-shaped radiation element including a power feed end and a ground end, and a matching circuit including a first inductance element loaded at the power feed end and a second inductance element loaded at the ground end and magnetic-field coupled to the first inductance element. The loop-shaped radiation element is configured to resonate in a plurality of resonance modes including an even mode and an odd mode. The first inductance element and the second inductance element are wound and connected such that magnetic fields are mutually strengthened for one of the even mode and the odd mode, and such that the magnetic fields are mutually weakened for the other of the even mode and the odd mode.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 6, 2015
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kenichi Ishizuka, Hiroshi Nishida
  • Patent number: 8965461
    Abstract: Exemplary embodiments are directed to wireless power transfer including generating an electromagnetic field at a resonant frequency of a transmit antenna to create a coupling-mode region within a near-field of the transmit antenna. A receive antenna placed within the coupling-mode region resonates at or near the resonant frequency. The receive antenna extracts energy from a coupling between the two antennas. Signaling from the receive antenna to the transmit antenna is performed by generating a first power consumption state for the receive antenna to signal a first receive signal state and generating a second power consumption state for the receive antenna to signal a second receive signal state. Signaling from the transmit antenna to the receive antenna is performed by enabling the resonant frequency on the transmit antenna to signal a first transmit signal state and disabling the resonant frequency on the transmit antenna to signal a second transmit signal state.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: February 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Stanley Slavko Toncich, William H. Von Novak
  • Patent number: 8862082
    Abstract: A receiver for nano communication includes a power source including a cathode and an anode; a cathode unit connected to the cathode of the power source, the cathode unit including a nano device configured to receive a wireless signal modulated according to a predetermined modulation scheme, have at least two different resonant frequencies, and resonate based on a frequency of the wireless signal and the at least two different resonant frequencies; and an anode unit connected to the anode of the power source, the anode unit being configured to detect electrons emitted from the nano device, and demodulate a the wireless signal based on a pattern of the detected electrons.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun Gi Ahn, Jong Bu Lim
  • Patent number: 8792937
    Abstract: A computing device with a configurable antenna. The antenna is configured through a switching circuit operating under software control. Operating characteristics of the antenna are configured based on connections between conducting segments established by the switching circuit, allowing the nominal frequency, bandwidth or other characteristics of the antenna to be configured. Because the switching is software controlled, the configurable antenna may be integrated with a software defined radio. The radio and antenna can be reconfigured to support communication according to different wireless technologies at different times or to interleave packets according to different wireless technologies to support concurrent sessions using different wireless technologies.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: July 29, 2014
    Assignee: Microsoft Corporation
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 8606193
    Abstract: An RF transceiver integrated circuit has a novel segmented, low parasitic capacitance, internal loopback conductor usable for conducting IP2 self testing and/or calibration. In a first novel aspect, the transmit mixer of the transceiver is a current mode output mixer. The receive mixer is a passive mixer that has a low input impedance. In the loopback mode, the transmit mixer drives a two tone current signal to the passive mixer via the loopback conductor. In a second novel aspect, only one quadrature branch of the transmit mixer is used to generate both tones required for carrying out an IP2 test. In a third novel aspect, a first calibration test is performed using one quadrature branch of the transmit mixer at the same time that a second calibration test is performed using the other quadrature branch, thereby reducing loopback test time and power consumption.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: December 10, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jin-Su Ko, Michael Kohlmann, Bahman Ahrari
  • Patent number: 8583065
    Abstract: A novel digitally controlled antenna tuning circuit that enables the implementation of low cost, wideband tuning circuits for antennas in receive applications. The invention is operative to switch a plurality of tuning elements into and out of a main receive signal path. Each individual tuning element is switched into or out of the receive signal path using a single PIN diode. For series connected tuning elements, the diode is connected in parallel to the tuning element. For tuning elements connected in parallel, the diode is connected in series with the tuning element. The diodes are switched in accordance with control voltages which forward bias the diodes to effectively create a low resistance path thus either inserting or removing a tuning element from the receive signal path depending on its configuration in the circuit.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: November 12, 2013
    Assignee: Vishay Intertechnology, Inc.
    Inventor: David Ben-Bassat
  • Patent number: 8489109
    Abstract: A mobile wireless device enables effective use of space in a case while reducing degradation of antenna gain and maintaining communication quality even if a plurality of antennas having different frequency bands are arranged close to one another. A magnetic antenna has a first switch unit, a second switch unit, and a concentrated constant circuit which are added to a wiring pattern at the side near to a main antenna, so that a first path and a second path can be selected. Under a predetermined condition, a CPU controls the first switch and the second switch to electrically connect terminal (A1) to terminal (B1) and electrically connect terminal (A2) to terminal (B2), thereby forming the first path; and electrically connect terminal (A1) to terminal (C1) and electrically connect terminal (A2) to terminal (C2), thereby forming the second path connected via the concentrated constant circuit.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: July 16, 2013
    Assignee: KYOCERA Corporation
    Inventors: Kenji Waku, Tadashi Koyama, Kunihiko Watanabe, Mitsuhiro Nishizono, Katsuji Morishita, Takeshi Iwanaga, Daisuke Togashi
  • Patent number: 8472904
    Abstract: In various embodiments, systems and methods for automatically tuning an antenna to a desired frequency utilize a tuning detection element that sends or receives a signal in accordance with one mode of the antenna and that is separated from the antenna by a gap and outside of a signal path of the antenna. In various system implementations, a processor communicates with the tuning detection element and antenna and monitors the amplitude of a signal transmitted to or from the tuning detection element. A resonant frequency of the antenna may be tuned to the desired frequency by a tuning element.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: June 25, 2013
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventor: Douglas W. White
  • Patent number: 8463340
    Abstract: Provided is a method of accessing to a communication system in a terminal comprising a plurality of antennas, which includes determining a home system which is previously set to preferentially access from a preferred roaming list of a plurality of communications systems, when power is turned on; connecting a system switch to a home antenna for communicating with the home system in a specific frequency band; and accessing the home system to use the home service through the home antenna.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: June 11, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong In Lee, Kun Hui Yi
  • Patent number: 8428531
    Abstract: A radio wave receiver including an antenna for receiving a radio wave; a tuning unit that can discretely changing a frequency characteristic of the antenna; an oscillation generator that can oscillate the antenna and a circuit portion of the tuning unit; a reception processing section for extracting a signal of a desired wave out of a reception signal received from the antenna; a controller for generating an oscillation signal at the circuit portion by the oscillation generator, and switching a setting of the tuning unit to search a setting state of the tuning unit under which the oscillation signal is extracted by the reception processing section; and a compensator for applying a variation to a frequency characteristic of the oscillation signal or a frequency characteristic associated with signal extraction of the reception processing section when the controller searches the setting state.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: April 23, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventor: Kaoru Someya
  • Patent number: 8340714
    Abstract: A computing device with a configurable antenna. The antenna is configured through a switching circuit operating under software control. Operating characteristics of the antenna are configured based on connections between conducting segments established by the switching circuit, allowing the nominal frequency, bandwidth or other characteristics of the antenna to be configured. Because the switching is software controlled, the configurable antenna may be integrated with a software defined radio. The radio and antenna can be reconfigured to support communication according to different wireless technologies at different times or to interleave packets according to different wireless technologies to support concurrent sessions using different wireless technologies.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: December 25, 2012
    Assignee: Microsoft Corporation
    Inventors: Amer A. Hassan, Christian Huitema
  • Patent number: 8274178
    Abstract: A resonant array for the transmission of multiple frequency wireless energy in multiple configurations at a useful distance for grid-coordinate power and information delivery on small aperture and mobile scales where alternatives such as battery, solar, infrared, microwave, or other power-independent means are inappropriate or inaccessible.
    Type: Grant
    Filed: June 5, 2010
    Date of Patent: September 25, 2012
    Inventor: Christopher Allen Tucker
  • Patent number: 8265555
    Abstract: A coupling device (1) is provided, especially a tube nozzle (2), for a medical device (3), especially a respirator (4), for the mechanical and electromagnetic coupling of the medical device (3) with the accessory (6), especially a tube system (19). The device includes a mechanical device for coupling the medical device (3) with the accessory (6), at least one inductance (8), at least one capacitance (12) and at least one electric line (18) for forming an electric circuit as a resonant circuit for the electromagnetic coupling of an inductance (8) at the medical device (3) with an inductance (8) at the accessory (6). The coupling device (1) is able to be checked for trouble-free operation without the accessory (6). The coupling device (1) is able to be manufactured at a low cost and make safe and reliable handling possible. The coupling device (1) has a semiconductor chip (16) for storing and/or processing at least one piece of information and/or for sending and/or receiving at least one signal.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: September 11, 2012
    Assignee: Dräger Medical GmbH
    Inventors: Markus Steeger, Mark Oliver Gertz, Gerd Wotha
  • Patent number: 8233864
    Abstract: Disclosed herein is a signal receiving apparatus including: a resonance section configured to receive an input signal at a variable resonance frequency; a signal supplying section configured to supply an electrical signal having a desired reception frequency to the resonance section; a mixture section configured to mix a resonance signal, which is output by the resonance section when the resonance section receives the electrical signal from the signal supplying section, with a switching signal having the desired reception frequency; and a control section configured to change a resonance characteristic of the resonance section and measure the phases of mixed signals output by the mixture section before and after the resonance characteristic changing operation to control the resonance frequency of the resonance section in order to change the resonance frequency in a direction to reduce a difference between the phases of the mixed signals before and after the resonance characteristic changing operation.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: July 31, 2012
    Assignee: Sony Corporation
    Inventor: Hitoshi Tomiyama
  • Patent number: 8229380
    Abstract: A radio wave receiving apparatus includes: an antenna to receive a radio wave; a tuning member to allow a reception frequency of the antenna to be tuned to an intended frequency, in which tuning member a frequency characteristic is variable; a receiving member to receive a reception signal from the antenna to demodulate a modulation wave; a positive feedback member to perform a positive feedback in a signal path including the tuning member; and a switching member to turn on/off a feedback operation of the positive feedback member.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 24, 2012
    Assignee: Casio Computer Co., Ltd.
    Inventor: Kaoru Someya
  • Patent number: 8131237
    Abstract: Disclosed is a radio wave receiving apparatus including: an antenna to receive a radio wave; a tuning member to allow a reception frequency of the antenna to be tuned to an intended frequency, in which tuning member a frequency characteristic is variable; a receiving member to receive a reception signal from the antenna to demodulate a modulation wave; a positive feedback member to perform a positive feedback in a signal path including the tuning member; and a switching member to turn on/off a feedback operation of the positive feedback member.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: March 6, 2012
    Assignee: Casio Computer Co., Ltd.
    Inventor: Kaoru Someya
  • Patent number: 8112043
    Abstract: One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes an antenna interface coupled to an antenna that exhibits a time-varying impedance. The RF communication device also includes a test interface coupled to RF test equipment that exhibits a test impedance. A tuning circuit in the RF communications device selectively provides a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface. Other methods and systems are also disclosed.
    Type: Grant
    Filed: April 11, 2008
    Date of Patent: February 7, 2012
    Assignee: Infineon Technologies AG
    Inventors: Mikael Bergholz Knudsen, Peter Bundgaard, Jan-Erik Mueller
  • Patent number: 7941103
    Abstract: A duplexer includes a transmit filter of a ladder type filter, connected between a common terminal and a transmitting terminal, and a receive filter of the ladder type filter, connected between the common terminal and a receiving terminal. One or more parallel resonators in the transmit filter are grounded through a transmitting inductance, and a portion of multiple parallel resonators are grounded through a first receiving inductance and a remaining portion of the multiple parallel resonators are grounded through a second receiving inductance.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: May 10, 2011
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yasuhide Iwamoto, Jun Tsutsumi, Masafumi Iwaki, Masanori Ueda
  • Patent number: 7917104
    Abstract: An embodiment of the present invention provides an apparatus, comprising an RF matching network connected to at least one RF input port and at least one RF output port and including one or more voltage or current controlled variable reactive elements; and wherein the RF matching network is tuned to optimize the RF matching network and wherein said tuning is limited by a predetermined number of tuning steps that are taken within a transmit burst and/or limited by the magnitude of each step taken within a transmit burst and/or limited to the steps only being allowed between bursts.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: March 29, 2011
    Assignee: Paratek Microwave, Inc.
    Inventors: Keith R. Manssen, Matthew R. Greene, Wayne E. Smith, Guillaume Blin
  • Patent number: 7848721
    Abstract: An antenna damping circuit in which the frequency characteristics of damping amount can be made substantially flat by providing a resistor (Ra) between PIN diodes (D1, D2) having a resistance varying upon application of a control voltage (Vc) and a capacitive dummy antenna circuit (10), and setting its resistance high enough to neglect the capacity of the dummy antenna circuit (10) sufficiently when the dummy antenna circuit (10) is viewed from the side of the PIN diodes (D1, D2) thereby substantially eliminating the influence of capacity of the dummy antenna circuit (10).
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: December 7, 2010
    Assignee: Ricoh Co., Ltd.
    Inventor: Kazuhisa Ishiguro
  • Patent number: 7840196
    Abstract: In a filter circuit, resonators is connected in parallel between input and output terminal, an input signal is input through the input terminal and supplied to the resonators. Signal generators are connected to the resonators to control the resonators. The signal generators are controlled by a control unit so that the resonators are resonated to generate resonance signals at different resonant frequencies and at predetermined resonance phases. Thus, the output signal is set within a desired frequency range.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 23, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroyuki Kayano
  • Patent number: 7729660
    Abstract: A communication device able to share one antenna and in addition able to sufficiently exhibit characteristics of a function as a reader, writer and a card function, a non-contact type IC card provided with that, and an information apparatus, wherein the device has a first transmission circuit 220 having first and second output terminals and outputting a carrier from the first and second output terminals in a first mode; an antenna circuit 210 including a node ND210, an inductor 211 having one end connected to the node, and having the other end connected to the second output terminal of the first transmission circuit, and a capacitor 212 connected between the node and the first output terminal of the first transmission circuit; a second transmission circuit 230 connected to the node of the antenna circuit and outputting the transmission data in a second mode; at least one reception circuit 240 connected to the node of the antenna circuit and performing reception processing with respect to data received at the
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: June 1, 2010
    Assignee: Sony Corporation
    Inventors: Satoru Kondo, Kenichi Kamiyama, Yukio Tanaka
  • Patent number: 7643809
    Abstract: Using low impedance switches and coupling to a virtual ground, one or more capacitors are selectively switched into or out of an inductive-capacitive resonant circuit portion of an integrated circuit filter to alter the resonant frequency based on a phase difference between the resonant frequency and a reference frequency. The capacitors are sized for a sequence of total capacitances proceeding by halves or doubles between values corresponding to minimum and maximum desired frequency adjustments, allowing a binary count of pulses representative of the phase difference to address the correct combination of capacitors. An exact or ratioed replica of the inductive-capacitive resonant circuit, controlled by the same capacitance selection signal, may be used as a frequency-selective amplifier load or matching network, or to form a ladder filter.
    Type: Grant
    Filed: September 6, 2005
    Date of Patent: January 5, 2010
    Assignee: National Semiconductor Corporation
    Inventor: Daniel R. Meacham
  • Patent number: 7583942
    Abstract: A tuning apparatus is provided, wherein the on and off resistances of semiconductor switches within an tuning IC are optimized, so as to provide high sensitivity and superior stability, a wide range of tuned frequency variation, compactness and high performance. The tuning apparatus has a tuning circuit, which has N-channel MOS transistors (N transistors) 5a through 5f, serving as a plurality of semiconductor switches, and a counter circuit 6, which controls the opening and closing of the N transistors, a plurality of capacitors 4a through 4f, which are each connected in series with the plurality of N transistors, and a receiving antenna 2 wherein the total electrostatic capacitance of the plurality of capacitors is varied by the opening and closing of the plurality of N transistors, thereby varying the frequency tuned by the plurality of capacitors and the receiving antenna.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: September 1, 2009
    Assignee: Citizen Holdings Co., Ltd.
    Inventor: Takashi Ihara
  • Patent number: 7570915
    Abstract: An antenna unit equipped with a satellite radio tuner and a tuner-unequipped head unit are connected to each other through a serial bus cable. Equipped in the antenna unit, the satellite radio tuner has a tuner portion, a digital demodulating portion, an interface portion, and a CPU. The interface portion serves as a speech/serial converting portion for converting a digital speech signal into a serial signal. The head unit includes an interface portion for receiving the serial signal sent from the antenna unit through a serial bus cable. The interface portion serves as a serial/speech converting portion for converting the received serial signal into the speech signal.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: August 4, 2009
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Takeo Watanabe, Yasuyuki Honma, Takumi Suzuki
  • Patent number: 7502598
    Abstract: In a transmitting arrangement a power amplifier is coupled to a radio-frequency antenna arrangement via a controllable matching apparatus. This allows direct impedance transformation of the output of the power amplifier to the input of the radio-frequency antenna arrangement. There is no need for transformation to the 50 ohm standard. The power amplifier, matching apparatus and a control circuit for controlling the impedance of the matching apparatus form a functional unit, which is advantageously in the form of a monolithically integrated structure in a semiconductor body. A receiving arrangement is produced in the same way, comprising an antenna, a filter device and a matching apparatus connected between them.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: March 10, 2009
    Assignee: Infineon Technologies AG
    Inventors: Rainer Kronberger, Dirk Heberling, Matthias Geissler, Jan-Erik Müller
  • Patent number: 7389091
    Abstract: A resonance circuit comprising, for example, an inductor and a plurality of capacitors is provided as a load of a transistor. The capacitors are changed over by a switch. As the capacitors are changed over by the switch, a resonance frequency is changed according to the invention the frequency hopping of an input signal. To cancel ringing that occurs at the time of the switching action, a transistor which cancels gate feed through is added to the switch. An inductor is provided at the gate in order to suppress a gain reduction and an increase in noise factor in a high-frequency range. This provides a compact, wide-band amplifier which has low noise, a wide gain and low power consumption.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: June 17, 2008
    Assignee: NEC Corporation
    Inventor: Akio Tanaka
  • Patent number: 7330708
    Abstract: There is disclosed a tuning circuit having a coil and a capacitor comprises a resistance-adjustment circuit connected in parallel with the coil and the capacitor. The resistance-adjustment circuit changes a resistance of the tuning circuit when resonant. The resistance-adjustment circuit comprises a series circuit of a resistor and a switching element having an ON-resistance smaller than the resistance of the resistor, and turning on/off the switching element causes the resistance of the tuning circuit when resonant to change.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: February 12, 2008
    Assignees: Sanyo Electric Co., Ltd., Tokyo University of Science
    Inventors: Masahiro Umewaka, Hiroya Yamamoto, Keitarou Sekine, Akira Hyougo, Keiji Morijiri
  • Patent number: 7286804
    Abstract: An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constituted by including an antenna 1, a high frequency receiving circuit 2, a local oscillator 3, two digital-analog converters (DACs) 4, 6, a control section 8, a mixing circuit 9, an intermediate frequency amplification circuit 10, a detection circuit 11, a low frequency amplification circuit 12 and the speaker 13. The DACs 4, 6 have a predetermined temperature coefficient, of which output voltage is changed in accordance with ambient temperature. When a characteristic of VCO 31 is changed with variations of ambient temperature so as to cause a control voltage applied to the VCO 31 to be changed, output voltages of the DACs 4, 6 are also changed similarly.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: October 23, 2007
    Assignee: Niigata Seimitsu Co., Ltd.
    Inventors: Hiroshi Miyagi, Isami Kato
  • Patent number: 7248838
    Abstract: A communication system for transmitting data between cores embedded in an integrated circuit on a silicon chip. Communication system includes transmitter circuitry for wirelessly transmitting data between cores and receiver circuitry for wirelessly receiving the transmission of data from other cores. Both transmitter circuitry and receiver circuitry may include of a phase-locked loop circuit having a voltage-controlled oscillator. Each core may transmit and receive data on a unique frequency with respect to other cores embedded in an integrated circuit on a silicon chip or transmit and receive data on the same frequency as other cores embedded in an integrated circuit on a silicon chip. Groups of cores may share transmitter and receiver circuitry.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: July 24, 2007
    Assignee: International Business Machines Corporation
    Inventors: Kenneth J. Goodnow, Riyon W. Harding, Charles J. Masenas, Jason M. Norman, Sebastian T. Ventrone
  • Patent number: 7245891
    Abstract: A mobile wireless communication device has a speaker that functions as a vibration alert in addition to an audio output device. The speaker is selected from a group of speakers having variation in mechanical vibration resonant frequency. A drive signal sweeps back and forth across a sweep frequency range including the varient speaker mechanical vibration resonant frequencies. The drive signal drives the speaker causing it to vibrate at the mechanical vibration resonant frequency and in turn causing the mobile wireless communication device to vibrate, thereby alerting the user. In this manner, the same drive signal can be used to vibrate each speaker at the speaker's mechanical vibration resonant frequency despite the variation in mechanical vibration resonant frequencies among the group of speakers.
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: July 17, 2007
    Assignee: Kyocera Wireless Corp.
    Inventor: Derick Hugunin
  • Patent number: 7184733
    Abstract: An oscillation frequency changing means is inserted between a tuner and an oscillator of local oscillator (56) of a high frequency receiving device, and the oscillation frequency changing means, in each frequency band received, changes the oscillation frequency characteristic of local oscillator (56) in relation to the tuning voltage supplied from PLL circuit (78), and operates in accordance with the frequency characteristic of tuning filter (52, 54, 62, 64) to obtain an oscillation signal varied just by a predetermined frequency, thereby making it possible to receive broadband channels of continuous VHF broadcast band and UHF broadcast band.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: February 27, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Sanae Asayama, Koji Nakatsuji, Atsuhito Terao, Yoshihide Tabata, Hideji Takami, Masanori Suzuki, Hirochika Kashima
  • Patent number: 7171178
    Abstract: A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein the amplitude of an output signal of the tuning circuit is varied by varying the resistance with the resistance-adjusting element.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: January 30, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Masahiro Umewaka, Hiroya Yamamoto, Keitaro Sekine, Akira Hyogo, Keiji Morijiri
  • Patent number: 7146137
    Abstract: To provide a high frequency switch capable of dealing with multiple frequency bands without having plurality of switch circuits. A first diode that conducts due to a bias current when a first switch is closed is interposed between first signal terminal and a second signal terminal. A strip line with the electrical length L1 is connected to the cathode of the first diode, the other end being grounded. At a position with a distance L2 from one end of the strip line, a capacitor and a second switch are connected to be equivalently grounded when the second switch is closed. The strip line resonates with the electrical length L1 when the second switch is opened, and resonates with the electrical length L2 when the second switch is closed.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: December 5, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yasuaki Namura
  • Patent number: 7142833
    Abstract: A matching unit includes a switching means for switching an inductance of a first inductor. This switching means sets an inductance such that a first inductor shows an inductance property to both of the VHF low-band and high-band, and shows a capacitance property to the UHF band. This structure allows the matching unit to achieve the matching for both the VHF low-band and high-band by just switching the two circuits of the VHF low-band and high-band, also allows the matching unit to show a capacitance property to the UHF band. Thus the loss produced in transmitting signals can be reduced, and the circuit can be simplified. As a result, the matching unit can be downsized, and the cost can be reduced.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: November 28, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yasuhiro Hibino, Ryuichi Kamimoto, Akira Ito
  • Patent number: 7116954
    Abstract: The present invention provides a tunable bandpass filter and method thereof. In a preferred embodiment, the tunable bandpass filter uses variable ferro-electric capacitors to adjust both the passband and the notch across the normal operating range of a wireless communications device. The tunable bandpass filter is capable of providing a tuning range over a desired frequency range with low I.L. and high out-of-band rejections.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: October 3, 2006
    Assignee: Kyocera Wireless Corp.
    Inventor: Stanley S. Toncich
  • Patent number: 7103320
    Abstract: A communication system (8) for transmitting data between cores (10) embedded in an integrated circuit on a silicon chip (12). Communication system (8) includes transmitter circuitry (24) for wirelessly transmitting data between cores (10) and receiver circuitry (26) for wirelessly receiving the transmission of data from other cores. Both transmitter circuitry (24) and receiver circuitry (26) may include of a phase-locked loop circuit (28, 30) having a voltage-controlled oscillator (36). Each core (10) may transmit and receive data on a unique frequency with respect to other cores embedded in an integrated circuit on a silicon chip (12) or transmit and receive data on the same frequency as other cores embedded in an integrated circuit on a silicon chip (12). Groups of cores (17) may share transmitter and receiver circuitry (24 and 26).
    Type: Grant
    Filed: April 19, 2003
    Date of Patent: September 5, 2006
    Assignee: International Business Machines Corporation
    Inventors: Kenneth J Goodnow, Riyon W Harding, Charles J Masenas, Jason M Norman, Sebastian T Ventrone
  • Patent number: 7065331
    Abstract: A resonator system and method are provided which includes/uses a tunable reference resonator, parts for tuning the reference resonator to a reference value via a controlled variable for the reference resonator, a tunable circuit resonator, and parts for tuning the circuit resonator which are designed such that the controlled variable for the reference resonator is used as a measure of the tuning of the circuit resonator, and wherein the reference resonator and/or the circuit resonator is/are designed as a surface acoustic wave component, a bulk acoustic wave component and/or a diaphragm oscillator.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: June 20, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christian Korden, Thomas Ostertag, Werner Ruile
  • Patent number: 6940358
    Abstract: Using low impedance switches and coupling to a virtual ground, one or more capacitors are selectively switched into or out of an inductive-capacitive resonant circuit portion of an integrated circuit filter to alter the resonant frequency based on a phase difference between the resonant frequency and a reference frequency. The capacitors are sized for a sequence of total capacitances proceeding by halves or doubles between values corresponding to minimum and maximum desired frequency adjustments, allowing a binary count of pulses representative of the phase difference to address the correct combination of capacitors. An exact or ratioed replica of the inductive-capacitive resonant circuit, controlled by the same capacitance selection signal, may be used as a frequency-selective amplifier load or matching network, or to form a ladder filter.
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: September 6, 2005
    Assignee: National Semiconductor Corporation
    Inventor: Daniel R. Meacham
  • Patent number: 6889036
    Abstract: An integrated center frequency selectable resonant coupling network suited for use in an integrated circuit is disclosed. The network includes an integrated coupling transformer having a secondary winding for coupling to a load and a primary winding for coupling to a source; a first integrated capacitive circuit controllably coupled across one of the primary and secondary windings and when so coupled operable to resonate with the integrated coupling transformer at a frequency in a first frequency band; and a second integrated capacitive circuit coupled across a second one of the primary and the secondary windings that is operable to resonate with the integrated coupling transformer at a frequency in a second frequency band.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: May 3, 2005
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Brian M. Ballweber, Stephen W. Dow
  • Patent number: 6750734
    Abstract: A receiver, such as a television receiver, tunes an inductive (“L”) and capacitive (“C”) filter based on a desired frequency. The LC filter includes a plurality of inductors, configured in at least one inductive (“L”) bank, and a plurality of capacitors configured in at least one capacitive (“C”) bank. The inductors are selectively enabled for the LC filter by an N code, and the capacitors are selectively enabled for the LC filter by an M code. The receiver uses a functional comparator to compare offset, capacitive, inductive and frequency values to tune the LC filter. Techniques for tuning the LC filter for operation in the VHF and UHF bands are disclosed.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: June 15, 2004
    Assignee: Ukom, Inc.
    Inventors: Kimitake Utsunomiya, Takatsugu Kamata
  • Publication number: 20040033794
    Abstract: A resonator system and method are provided which includes/uses a tunable reference resonator, parts for tuning the reference resonator to a reference value via a controlled variable for the reference resonator, a tunable circuit resonator, and parts for tuning the circuit resonator which are designed such that the controlled variable for the reference resonator is used as a measure of the tuning of the circuit resonator, and wherein the reference resonator and/or the circuit resonator is/are designed as a surface acoustic wave component, a bulk acoustic wave component and/or a diaphragm oscillator.
    Type: Application
    Filed: March 25, 2003
    Publication date: February 19, 2004
    Inventors: Christian Korden, Thomas Ostertag, Werner Ruile
  • Patent number: 6615031
    Abstract: In a heterodyne stage having a separating filter providing broadband termination for an output of a mixer, a resistance having the value of a system impedance is arranged between the separating filter and a following intermediate-frequency filter, the resistor being interconnected with a resonance element tuned to the intermediate frequency in such a way that the resistor, at the intermediate frequency, has minimal attenuation of the useful signal and, at all other frequencies, terminates the output of the mixer with the system impedance.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: September 2, 2003
    Inventors: Ulrich L. Rohde, Klaus Danzeisen
  • Publication number: 20030083027
    Abstract: A method for tuning a cavity filter is provided. The cavity filter includes a plurality of tuning members. The method includes selecting a stored set of positional values for the tuning members, driving the tuning members of the cavity filter to the stored set of positional values, and further adjusting the position of the tuning members as necessary to achieve a desired frequency response for the cavity filter.
    Type: Application
    Filed: October 26, 2001
    Publication date: May 1, 2003
    Applicant: ADC Telecommunications, Inc.
    Inventor: Hannu K. Impio
  • Patent number: 6393264
    Abstract: A portable radio terminal apparatus for transmitting and receiving signals in different frequency ranges which has an apparatus for switching the radio terminal apparatus over into a respective frequency range, an antenna and a first antenna matching circuit arrangement for matching the radio terminal apparatus to a first frequency range. The antenna arrangement includes only one antenna whereby at least a second antenna matching circuit arrangement is provided which, given a switching over of the radio terminal apparatus from the first frequency range into a second frequency range, can be connected to the first antenna matching circuit arrangement.
    Type: Grant
    Filed: March 12, 1998
    Date of Patent: May 21, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ralf Scholz
  • Patent number: 6343208
    Abstract: The present invention provides a miniature, built-in multi-band antenna which is suitable for use in future compact mobile terminals. According to exemplary embodiments, a built-in patch antenna is provided which includes patch elements of different sizes and capable of being tuned to different frequency bands. On each patch element is formed a slot which divides the patch element into sub-parts. Each sub-part of a patch element is structured so as to be resonant at a frequency in the same frequency band to which the patch element is tuned. As a result, a high efficiency, broad band, multi-band, and surface mountable low profile antenna can be realized.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: January 29, 2002
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Zhinong Ying